Home / 138,215.63-190,743.70-77,790.19

Finding the Fourth Proportional to 138,215.63, 190,743.70 and 77,790.19

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Solution

The fourth proportional to 138,215.63, 190,743.70 and 77,790.19 is: 107,353.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,215.63 : 190,743.70 = 77,790.19 : x
  2. Step 2: Convert to fraction form
    138,215.63/190,743.70 = 77,790.19/x
  3. Step 3: Cross multiply
    138,215.63x = 190,743.70 × 77,790.19
  4. Step 4: Simplify right side
    138,215.63x = 14,837,988,074.64
  5. Step 5: Solve for x
    x = 14,837,988,074.64/138,215.63
  6. Step 6: Final answer
    x = 107,353.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.